A Starbucks Toffee Hazelnut Latte has about 270 calories, which is for a large (Grande) cup. If you choose a medium (Tall) or small (Short) cup, the calories will be reduced accordingly.

Starbucks' Toffee Hazelnut Latte is a very popular Christmas seasonal-only drink that consists of espresso, steamed milk, toffee hazelnut syrup topped with whippedcream and crushed toffee hazelnuts. The espresso is relatively low in calories, but the milk and syrup add to the calorie content of the drink, especially the syrup, which is one of the main sources of calories in this drink. The toffee hazelnut syrup is not only sweet, but it is also rich in sugar and therefore high in calories. In addition, the swirled cream on top is also a significant contributor of calories, as cream is rich in fat.

It's important to note that 270 calories is a ballpark figure, and the exact calorie count may vary depending on the cup size, ingredient proportions, and minor differences in preparation methods. If you add extra syrups, cream or other toppings to your drink, the calories will increase accordingly. Therefore, if you are controlling your calorie intake or following a specific diet plan, it is best to ask a Starbucks employee for specific calorie information when ordering and to adjust toppings and cup size to suit your individual needs.